Alumina ceramics is one of the most widely research and application of engineering ceramics, with high melting point (2050 ℃) and high hardness (hra), 90-92, insulation performance is good, volume resistivity is as high as 1015 Ω · cm), chemical stability is good wait for an advantage, is widely used for high temperature structural materials, wear-resistant materials, electrical insulating materials and chemical corrosion resistant materials, such as high temperature kiln furniture material, the wear-resisting lining and grinding body, electric vacuum tube shell and ceramic substrate, high temperature flue gas purification ceramic membrane materials, chemical, transparent ceramic electronics lens cap, wear resistant coating and so on.
99% alumina ceramic pad plate
The key to the preparation of high performance alumina ceramics lies in the purity, particle morphology and particle size distribution of the powder.
In recent years, with the increasing demand for transparent alumina ceramics and sapphire crystals, the preparation technology of high purity ultra-fine or nanometer sized alumina powders has been developed rapidly.
The raw material for preparing transparent alumina ceramics is high purity ultrafine powder with purity up to 4N and particle size less than 100nm, while sapphire crystal growth requires the purity of raw materials up to 5N.
Domestic high purity alumina powder has entered the stage of industrialization production, but due to a lack of stable production technology and equipment and disconnect test research and production application, stability in batches, powder particle size distribution and removal of trace element and so on is still a gap compared with abroad.
